6Characters engaging in passionate sexual intercourse with each other's brains

I love undertale and brain sex so...

Examples:

Asriel with Toriel's in Motherly F-eryAlphys and Undyne with Catty's and Bratty's in HBACSAPSFlowey with Alphys' in Vengeful TormentAlphys and Undyne with Asriel's in The Iron MettagiantBurgerpants with Francis' in I See Alphys I See FrancisAnd of course, Alphys with Toriel's in Incestual Apocalypse - xandermartin98

7Alphamalg (Alphys X Amalgamates)

Why?!? Xander, this is just weird. Alphys basically is in love with like 20 creatures? Background creatures nonetheless!

That porn though - NoOreoForU

You know, the each Amalgamate is, like, twenty monsters. Why would all of them fall in love with the scientist who did this to them?Plus... Alphyne for life.

Yet another reason to feel incredibly bad for Alphys: this absolute living NIGHTMARE of a shipping.

However, what's more surprising still is the fact that (believe it or not) there has actually been a GOOD, non-NSFW fanfic for this shipping.

I honestly don't know how that's even possible, but it somehow happened...

in An Alphamalg Sleepover

(just kidding though; Alphamalg in general is a hilarious series of fanfics that you should definitely read sometime) - xandermartin98

8Underfoot Fetishtale (Fanfic)

Do I really need to explain?

Just look at the title. - xandermartin98

9Undertale Twerking

I thought the FNAF fandom was freaky, but what the hell is this?! LIKE ARE YOU FOR REAL NOW! TWERKING! The game is okay, it reminds me of the classic games like old Nintendo, and the good old day... BUT FANDOMS HAVE TO RUIN IT BY MAKING STUPID LIKE TWERKING! ! CHILL OUT FANDOM GOOD GOD!

3lame studios

I can't stop laughing kill me

And I thought FNaF had it bad...Oh my... what!StahpoversexualizingtheskeletonStahpoversexualizingtheskeletonsStahpoversexualizingtheskeletons StahpoversexualizingtheskeletonsSTAHP OVERSEXUALIZING THE SKELETONS!Get out of here twerking TorielGoodbye creepy fandom!(Raises gun to head)DELETE THIS!DELETE THIS!THIS FANDOM ALREADY BECAME GARBAGE A LONG TIME AGO!but I still love the game - _-

NO. ITS BONES FOR GODS SAKE. BOONES. LIKE, THEY HAVE NO GENITALS. THEY HAVE LITERALLY NOTHING GOING ON DOWN THERE. ITS TIME TO STOP. - SansTheComic

NNNGAH WHY THE EENERGY PENIS

13Muffet Porn

This isn't acceptable either! These are video game characters, for gods sake. But hey, sexualizing skeletons is the worst.

WHY!? JUST WHY!?

It's...a spider. - SansTheComic

14"Undertale is better than life" troll video by gligar13vids

How do you pull your big laptop out and play undertale in class?

15Completely Ruining The Word "Determination"

The only thing on this list that I do fandoms can bring people together, but they are so messed up.

I saw a comic of frisk flirting with toriel, toriel just chuckled and hung up and frisk said "You are filled with determination."

16Eardrum Licking

WHAT!? *falls into the underground by shock* NOW I NEED TO DO THIS ALL AGAIN! *runs to snowdin takes lesserdog to the start of the game and pets it so it becomes a ladder* *climbs up*

17The Giantess Alphys Scene from Alphys VS Undyne

I have not read this fic but its Giantess so...

I am quite honestly at a loss for words after reading and writing this scene...like, I seriously just don't know what to say.

Actually, I do; it's my second favorite fanfiction scene ever. EVER.

Like, seriously, if you ever find yourself needing some cute and funny fanfiction stuff to read and haven't read this story yet, then I would strongly encourage you to do so immediately. - xandermartin98

18Submissive Undyne worshipping Dominatrix Alphys' feet

Perfectly ironic with how Undyne, she's like the fierce warrior, and alphys is the shy nerd...Wait, this is a foot fetish, isn't it

This is just strange. Papyrus watches his show. So? You don't fall in love with someone the moment you see them on T.V. right? Besides, the shippers once started attacking me for saying I don't support it by screaming "I bet you ship flowey x toriel" honestly, I couldn't care less about ships.

46Sans is White

47Frisk is Yellow

48Wording the phrase "you're gonna have a bad time" in about a million different ways

Thousands* - NoOreoForU

49Requesting a comic adaptation of the fanfic "Alphys Gets Overly Intimate With The Amalgamates"